Indoor boomerang



FIG. 1 is a top plan view of an indoor boomerang showing my new design;

FIG. 2 is a bottom plan view of the boomerang; and,

FIG. 3 is an elevational view taken from one side of the boomerang, the other sides comprising mirror images of the side that is shown. 

The ornamental design for an indoor boomerang, as shown. 